Tim Cook's commencement address demonstrated again how deeply he understands Apple culture. Photo: George Washington University

Tim Cook welcomed students into the working world this weekend by giving the commencement address at George Washington University’s graduation ceremony.

Cook — who received an honorary doctorate as part of the ceremony — spoke about Apple’s status as a force for good in the world: something which has been a theme during his tenure as the company’s CEO. More importantly, he got in a great dig at the expense of Apple’s iPhone competitors.